Calender clock



G. MARA-NViLLE Calendar Clock;

No. 31,612 Patented March 5, 1861.

WM 2500610 wawizmzymw A. or il xtli l.

GALUSHA MARANY'ILLE, OF HAMPTON CORNERS, NEN YORK.

CALENDAR-CLOCK.

Specification of Letters Patent No. 81,612, dated March 5, 1861.

T0 aZZ whom it may concern:

Be it known that I, G. MAnaxviLLE, of Hampton Corners, in the county ofashington and State of New York, have invented a new and usefulImprovement in Calendar-Clocks; and I do hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the accompanying drawing, forming a part of thisspecification, in which Figure 1 represents a face view of my invention.Fig. 2 is a transverse vertical section of the same. 1

Similar letters of reference in both views indicate corresponding parts.

Vith calendar clocks of the ordinary construction the motion of the weekday wheel, and of the month wheel and also of the year wheel if such beattached to the clock, is rendered automatic and much ingenuity andlabor is spent in producing the variations in the motion required by thevarying length of different months and years. Clocks of this kind aretherefore rendered very complicated and the slightest accident causes aderangement of the movement, so that the same are not only veryexpensive, but they also prove a constant source of trouble and expensefor their proprietor.

To overcome these difficulties and to produce a calendar clock which isat once simple, cheap, reliable and not easily deranged is the object ofmy invention.

To enable those skilled in the art to make and use my invention I willproceed to describe its construction and operation with reference to thedrawing.

The face plate A of the clock is marked with figures from 1 to 12 toindicate the hours of the day in the ordinary manner and the hour hand5, and the minute hand a, are both attached to and moved from thecentral arbor c, of the clock movement as usual with clocks of theordinary construc tion.

The space around the figures l to 12 is perforated with 31 apertures (Z,and an annular space 6, marked off on the face plate A outside theapertures (Z, has inscribed on it the figures from 1 to 31 one figurebeing opposite to each of the apertures (Z. These apertures are of sucha size, that they do not occupy the entire circle around the figures ofthe ordinary clock dial, and a space is left on the annular space 6,between the fig ures 31 and 1 which is partially occupied by an aperturef, in the face plate.

Arranged below the face plate A and so as to turn around the centralshaft of the clock movement and independent of the same, are two disksor dials B, C, one above the other. The diameter of the upper one ofthese dials is equal to the inside diameter of the annular space 0, andit is marked with the names of the week days near to its periphery, saidnames being so arranged that they are visible through the apertures (Z,in the face plate A. A pin or button extending through a segmental slot72, in the face plate serves to adjust the week day dial B so that theproper name can be brought opposite the figure 1 in the annular space(2, and its edge is provided with teeth 2', which gear into a pinion j,that is operated by means of a button 7;, so that said dial can berotated with perfect ease and independent of the dial B, or of thecentral shaft 0. This dial is marked on its face with the names of themonths near to its periphery and said names are so arranged that thesame can be brought before the aperture 7', in the face plate one afterthe other by rotating the dial C.

The days of the week and the day of the month or the date are pointedout by a hand D, to which motion is imparted by means of a ratchet wheelZ. This wheel is placed loosely on the central shaft 0, and it ispropelled by a tooth m, which projects from the face of a cog wheel a.This wheel receives its motion from the hour wheel of the clock movementand it is geared up so that it rotates once in 2% hours. The ratchetwheel Z, is propelled one tooth for each revolution of the 2% hour wheela, and its teeth are so arranged that for each motion of the ratchetwheel the hand D is propelled from one of the apertures (Z, to the nextsucceeding one, and from one of the figures in the annular space 0, tothe next one. A spring pawl 0, prevents the ratchet wheel turning in thewrong direction.

The operation is as follows. At the beginning of a month the dial ordisk C, is rotated so as to bring the name of said month before theaperture f, in the face plate and the dial B, is turned until the nameof the proper week day stands opposite to the figure 1 in the annularspace (2, and the hand D is made to point on the figure 4 in saidannular space. The ratchet wheel Z and the cog wheel a, are so adjustedthat the carrying tooth m, or the cog wheel n, comes in contact with theteeth of the ratchet wheel about at midnight and the hand D is propelledfrom the figure 1 to the figure 2 in the annular space and so forth atthe end of every succeeding day so that said hand points out the name ofthe current day of the week-and also the date. This motion of the hand Dcontinues until at the end of each month or at the be ginning of theneXt succeeding month it is necessary to set again the dials B, and C,and the hand D, as above described.

By this exceedingly simple arrangement of the dials B, and G, and of thehand D all the advantages generally derived from very complicatedcalendar movements are ment and the whole arranged and adapted tooperate in connection, in manner substantially as and for the purposesherein shown and descrlbed.

GALUSHA MARANVILLE.

Witnesses \V. HAUFF,

JAMES LAIRD.

